Toon,
I would suspect this boost is from the series of changes
to "Update default arch for x86" from HJ Lu. This should now
have -msse2 in use as the default (except on darwin where
we went to -msse3 since all of our processors support that).
Jack
On Sun, Mar 07, 2010 at 07:34:22PM +0100, Toon Moene wrote:
> L.S.,
>
> In the past week, changes to GNU Fortran / GCC brought me a 4 minute
> gain in a 3.5 hour weather forecast (run 4 times a day on my home
> computer - see http://moene.org/~hirlam/)
>
> 4 minutes on 210 minutes is ~ 2 % - not bad for such a diverse code.
>
> Without digging deeper in it (for which I have little time) it is
> impossible to say what change in the past week "made the difference" (if
> even it is just one).
>
> Cheers,
>
> --
> Toon Moene - e-mail: t...@moene.org - phone: +31 346 214290
> Saturnushof 14, 3738 XG Maartensdijk, The Netherlands
> At home: http://moene.org/~toon/
> Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html
